Pre-heat oven to 180C and spray a casserole dish with nonstick cooking spray.,Heat oil in a frypan and add garlic and onion, saute for 3 minutes.,Add the capsicum, corn, 1/4 cup stock, thyme and pepper, cook until capsicum softens, approx 3 minutes.,Stir in the remaining stock, rice, sour cream and mustard. Add the chicken and remove from heat.,Stir in 1/3 of the cheese and parsley until well combined.,Transfer mix to the prepared casserole dish and sprinkle with the remaining cheese.,______